Overview Reviews Similar Products –> Product Description 24# White, Single Window Envelopes – Qty 500 – 9 1/2″ x 4 1/8″ Envelopes per Box. Regular gum. Can also be personalized for an additional fee. We will fax or email you a proof for approval on all personalized and custom orders prior to printing. Personalized envelopes normally ship within 5 business days. Product Videos Custom Field Product Reviews Write a Review Write a Review SW10ENV – White Single Window Envelopes (blank or personalized) Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *